scss 可访问的复选框替换（按钮样式控件）

Posted 2021-05-17

// from https://html5boilerplate.com/
%visuallyhidden {
  border: 0;
  clip: rect(0 0 0 0);
  -webkit-clip-path: inset(50%);
  clip-path: inset(50%);
  height: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  width: 1px;
  white-space: nowrap; /* 1 */

  // Extends the .visuallyhidden class to allow the element to be focusable when navigated to via the keyboard:
  // https://www.drupal.org/node/897638
  &.focusable:active,
  &.focusable:focus {
    clip: auto;
    -webkit-clip-path: none;
    clip-path: none;
    height: auto;
    margin: 0;
    overflow: visible;
    position: static;
    width: auto;
    white-space: inherit;
  }
}

@import 'utilities';

$box-shadow-buttons: 0 2px 2px 0 rgba(0, 0, 0, 0.2);

label {
  input[type='checkbox'], input[type='radio'] {
    @extend %visuallyhidden;
  }

  input + span {
    cursor: pointer;
    display: flex;
    font-weight: normal;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    border-radius: 0.2rem;
    box-shadow: $box-shadow-buttons;
    padding: 1.6rem 1.5rem 1.4rem;

    transition: background-color 0.2s;
  }

  input:checked + span {
    background-color: #99ffbd;
    box-shadow: inset $box-shadow-buttons;
  }

  input:disabled + span {
    opacity: 0.5;
  }
  
  input[type='checkbox'].focus-ring + span {
    box-shadow: 0 0 2px 1px #333;
  }

  input[type='checkbox']:checked.focus-ring + span {
    box-shadow: 0 0 2px 1px #222;
  }
}